CN114229861A - Bentonite additive and preparation method thereof - Google Patents
Bentonite additive and preparation method thereof Download PDFInfo
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- CN114229861A CN114229861A CN202111470878.8A CN202111470878A CN114229861A CN 114229861 A CN114229861 A CN 114229861A CN 202111470878 A CN202111470878 A CN 202111470878A CN 114229861 A CN114229861 A CN 114229861A
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- bentonite
- sodium
- additive
- calcium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
Abstract
The invention relates to a bentonite additive which comprises the following components in percentage by mass: 40-60% of complexing agent, 15-25% of sodium modifier and 25-35% of thickening agent. The complexing agent is added to enable the calcium ion in the calcium bentonite to form a stable water-soluble complex, and the sodium modifier is added to effectively modify the bentonite by sodium so as to improve the efficiency of sodium treatment; the addition of the thickening agent can increase the viscosity of the modified sodium bentonite product, thereby improving the quality of the product; by compounding and adjusting the raw materials of the additive, the efficiency of the additive in treating the calcium bentonite by sodium treatment is improved, and the technical problems of long time consumption and poor performance of the conventional calcium bentonite sodium modification are effectively solved.
Description
Technical Field
The invention relates to the technical field of bentonite modification, in particular to a bentonite additive and a preparation method thereof.
Background
Bentonite is a non-metallic mineral product with montmorillonite as the main mineral component, commonly called "Universal soil" which is generally a compact massive, foliated, fibrous or radial aggregate. The interlayer cation type of bentonite is determined by the interlayer cation type of the bentonite, and the interlayer cation is Na+Is called sodium bentonite, and interlayer cation is Ca+It is called calcium bentonite. The bentonite has strong hygroscopicity and expansibility, can adsorb water with volume being 8-15 times of that of the bentonite, and has volume expansion being several times to 30 times; can be dispersed into a gelatinous state and a suspended state in an aqueous medium, and the medium solution has certain viscosity, thixotropy, lubricity and the like, so the aqueous dispersion medium is widely applied to different industries such as drilling, exploration, fertilizers, pesticides, chemical engineering and the like.
The bentonite produced in nature is mostly calcium bentonite; compared with calcium bentonite, sodium bentonite has higher index advantages such as viscosity value, expansion coefficient, water absorption rate, thixotropy and the like, and can better meet the requirements of various high standards of industry, so the sodium bentonite is obtained by performing sodium modification treatment on the calcium bentonite in the prior art.
In the prior art, sodium modifiers (such as sodium carbonate, sodium bicarbonate, sodium silicate, sodium nitrate and the like) are usually added into calcium bentonite, and then activation treatment is carried out, so that the sodium bentonite can be obtained. However, the above-mentioned activation treatment requires a long time and has some disadvantages in performance.
Therefore, the prior art has a larger improvement space.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a bentonite additive.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the bentonite additive comprises the following components in percentage by mass: 40-60% of complexing agent, 15-25% of sodium modifier and 25-35% of thickening agent.
The added complexing agent can form a stable water-soluble complex with calcium ions in the calcium bentonite, and the added sodium modifier can effectively perform sodium modification on the bentonite so as to improve the sodium modification treatment efficiency; the addition of the thickening agent can increase the viscosity of the modified sodium bentonite product, thereby improving the quality of the product.
According to the scheme, the complexing agent is one of sodium tripolyphosphate, ethylene diamine tetraacetic acid and trisodium phosphate.
According to the scheme, the sodium modification modifier is one of sodium hydroxide and sodium carbonate.
According to the scheme, the thickening agent is one of carboxymethyl cellulose, sodium carboxymethyl starch and hydroxypropyl cellulose.
A preparation method of a bentonite additive comprises the following steps: weighing the raw materials of the components according to the proportion, adding the raw materials into a ball mill, and uniformly mixing the raw materials by ball milling to obtain the bentonite additive.
The invention has the beneficial effects that:
the complexing agent is added to enable the calcium ion in the calcium bentonite to form a stable water-soluble complex, and the sodium modifier is added to effectively modify the bentonite by sodium so as to improve the efficiency of sodium treatment; the addition of the thickening agent can increase the viscosity of the modified sodium bentonite product, thereby improving the quality of the product. According to the invention, through compounding and adjusting the raw materials of the additive, the sodium treatment efficiency of the additive on the calcium bentonite is improved, and the technical problems of long time consumption and poor performance of the existing sodium modification of the calcium bentonite are effectively solved.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the content of the present invention, but the present invention is not limited to the following examples.
Example 1
The bentonite additive comprises the following components in percentage by mass: 40% of complexing agent, 25% of sodium modifier and 35% of thickening agent; the complexing agent is sodium tripolyphosphate, the sodium modification agent is sodium hydroxide, and the thickening agent is carboxymethyl cellulose.
The preparation method of the bentonite additive comprises the following steps: weighing the raw materials of the components according to the proportion, adding the raw materials into a ball mill, and uniformly mixing the raw materials by ball milling to obtain the bentonite additive.
The bentonite additive obtained by the method is applied to sodium treatment of calcium bentonite, and comprises the following steps:
1) selecting calcium-based bentonite from Liaoning Heishan, adding the calcium-based bentonite into a ball mill, grinding for 8 minutes, and sieving with a 20-mesh sieve to obtain the ball-milled calcium-based bentonite;
2) respectively weighing 187g and 13g of the calcium bentonite obtained in the step 1) and bentonite additives, and adding the two into a ball mill for ball milling for 20 minutes to obtain the bentonite subjected to sodium treatment.
Example 2
The bentonite additive comprises the following components in percentage by mass: 50% of complexing agent, 20% of sodium modifier and 30% of thickening agent; the complexing agent is ethylenediamine tetraacetic acid, the sodium modification agent is sodium hydroxide, and the thickening agent is sodium carboxymethyl starch.
The preparation method of the bentonite additive comprises the following steps: weighing the raw materials of the components according to the proportion, adding the raw materials into a ball mill, and uniformly mixing the raw materials by ball milling to obtain the bentonite additive.
The procedure of applying the bentonite additive obtained above to sodium-treated calcium bentonite was the same as in example 1.
Example 3
The bentonite additive comprises the following components in percentage by mass: 60% of complexing agent, 15% of sodium modifier and 25% of thickening agent; the complexing agent is trisodium phosphate, the sodium modification agent is sodium carbonate, and the thickening agent is hydroxypropyl cellulose.
The preparation method of the bentonite additive comprises the following steps: weighing the raw materials of the components according to the proportion, adding the raw materials into a ball mill, and uniformly mixing the raw materials by ball milling to obtain the bentonite additive.
The procedure of applying the bentonite additive obtained above to sodium-treated calcium bentonite was the same as in example 1.
Comparative example 1
A method for treating calcium bentonite comprises the following steps:
1) selecting the same batch of calcium-based bentonite of Liaoning Heishan as in example 1, adding the calcium-based bentonite into a ball mill, crushing for 8 minutes, and sieving with a 20-mesh sieve to obtain the ball-milled calcium-based bentonite;
2) respectively weighing 187g of the calcium bentonite obtained in the step 1) and 13g of sodium carbonate, adding the calcium bentonite and the sodium carbonate into a ball mill, and ball-milling for 20 minutes to obtain the treated bentonite.
Comparative example 2
A method for treating calcium bentonite comprises the following steps:
1) selecting the same batch of calcium-based bentonite of Liaoning Heishan as in example 1, adding the calcium-based bentonite into a ball mill, crushing for 8 minutes, and sieving with a 20-mesh sieve to obtain the ball-milled calcium-based bentonite;
2) respectively weighing 187g of calcium bentonite obtained in the step 1) and 13g of sodium carbonate, adding the calcium bentonite and the sodium carbonate into a ball mill, and ball-milling for 20 minutes to obtain primary-treated bentonite;
3) spraying water into the primary treated bentonite obtained in the step 2) until the water content is 40%, and then activating for 30 days to obtain activated bentonite;
4) drying the activated bentonite obtained in the step 3) until the moisture content is 15% to obtain the treated bentonite.
The bentonite treated in the examples 1 to 3 and the comparative document 1 is subjected to performance detection, and the performance detection data are shown in the following table 1:
TABLE 1
Wherein, the blue absorption amount and the water absorption rate of the bentonite are measured according to the method described in the national standard GB/T20793-2007; the 15% solution is a solution obtained by mixing bentonite and water at a mass ratio of 15: 85. The method for testing the colloidal value comprises the following steps: 15g of the bentonite obtained after the treatment is respectively placed in a 100ml measuring cylinder with a plug and filled with 50ml of distilled water, and the distilled water is added to 90ml so that the sample is fully dispersed and uniformly mixed with the water; add 1g of magnesium oxide, add distilled water to the mark, plug and shake for 3 min. Standing for 24h, and reading the scale value of the gel interface, namely the gel price, which is expressed by ml/15 g.
Therefore, the bentonite additive is adopted to treat the bentonite without an activation process, but the performance of the obtained bentonite is better than that of the bentonite subjected to activation treatment; according to the invention, through compounding and adjusting the raw materials of the additive, the sodium treatment efficiency of the additive on the calcium bentonite is improved, and the technical problems of long time consumption and poor performance of the existing sodium modification of the calcium bentonite are effectively solved.
The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.
Claims (5)
1. The bentonite additive is characterized by comprising the following components in percentage by mass: 40-60% of complexing agent, 15-25% of sodium modifier and 25-35% of thickening agent.
2. The bentonite additive of claim 1 wherein the complexing agent is one of sodium tripolyphosphate, ethylenediaminetetraacetic acid, trisodium phosphate.
3. The bentonite additive of claim 1, wherein the sodium modifier is one of sodium hydroxide and sodium carbonate.
4. The bentonite additive of claim 1, wherein the thickener is one of carboxymethyl cellulose, sodium carboxymethyl starch, and hydroxypropyl cellulose.
5. A process for the preparation of the bentonite additive according to any one of claims 1 to 4, characterized in that it comprises the following steps: weighing the raw materials of the components according to the proportion, adding the raw materials into a ball mill, and uniformly mixing the raw materials by ball milling to obtain the bentonite additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111470878.8A CN114229861A (en) | 2021-12-03 | 2021-12-03 | Bentonite additive and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111470878.8A CN114229861A (en) | 2021-12-03 | 2021-12-03 | Bentonite additive and preparation method thereof |
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| CN114229861A true CN114229861A (en) | 2022-03-25 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896294A (en) * | 2014-03-26 | 2014-07-02 | 芜湖恒杰膨润土科技有限公司 | Artificial sodium bentonite |
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2021
- 2021-12-03 CN CN202111470878.8A patent/CN114229861A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896294A (en) * | 2014-03-26 | 2014-07-02 | 芜湖恒杰膨润土科技有限公司 | Artificial sodium bentonite |
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